Alarm-clock.



W. E. PORTER.

ALARM CLOCK. APPLICATION FILED JUNE 8, 1908.

Patented Oct. 20, 1908.

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ALARM CLOCK.

APPLIOATIONYFILBD JUNE 8, 1908.

901,737. I Patented 0011.20, 1908.

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' UNITED STATES 'rn rnn' FFTOEI.

WILSON E. PORTER,

OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO NEW HAVEN CLOCK 00.,

OF NEW HAVEN, CONNECTICUT, A CORPORATION.

ALARM-CLOCK.

$pecification of Letters Patent.

Patented Oct. 20, 1908.

Application filed June 8, 1908. Serial No. 437,342.

To all whom it may concern:

Be it known that I, WILSON E. PORTER, a citizen of the United States,residing at New Haven, in the county of New Haven and State ofConnecticut, have invented a new and useful Improvement in Alarm-Clocks;and I do hereby declare the following, when taken in connection with theaccompanying drawings and the letters of reference marked thereon, to bea full, clear, and exact description of the same, and which saiddrawings constitute part of this specification, and represent, iii-- 7Figure 1 a view in front elevation of the time-dial of an alarm-clockconstructed in accordance with my invention, and showing the concentricarrangement therewith of the alarm hand or pointer. Fig. 2 a view of theclock in front elevation with the dial removed, but showing its threeconcentric pointers. Fig. 3 a view thereof in vertical section with thepointers arranged in line. Fig. 4 a view in vertical transverse sectionlooking forward toward the rear face of the front movement-plate. Fig. 5a detached plan view of the alarm spring and the combined lifting-camand warning pin carried by it, a lifting-lever coacting with the saidcam, and the warning-finger coacting with the said pin being also shownin this figure in section. Fig. 6 a detached perspective view of thelocking-lever. Fig. 7 a detached view of the alarm-sustaining cam andoscillating shutter. Fig. 8 a detached view of the alarm-sustaining cam.Fig. 9 a detached view of the alarm-sustaining shutter.

This invention relates to an improvement in alarm clocks of that classwhich, although providing for setting the alarm on a twelve hour dial,are constructed so that the alarm is sounded only once in twenty-fourhours, the object of my present invention being to provide a simple,convenient and reliable alarm clock having an alarm hand or pointerarranged concentrically with the time-dial which is used in setting thealarm in place of the special alarm dial commonly used.

With these ends in view my invention consists in an alarm clock havingcertain details of construction and combinations of parts as will behereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, I employ an alarm hand orpointer 2 arranged concentrically with the time-dial 3 upon the 0f theclock and frictionally mounted upon an alarm-setting pinion 4 turningloosely hour hand socket 5 upon which an hour hand 6 is frictionallymounted, the minute hand 7 being applied to the projecting outer end ofthe center shaft 8 the projecting rear end of which is furnished with aknurled finger-button 9. The pinion 4 aforesaid is meshed into andturned by an alarmsetting wheel 10 fixed upon the projecting forward endof an alarm-setting shaft 11 furnished at its projecting rear end with aknurled finger-button 12 and at its forward end with a collet 13 formedwith a cog-like let-0H tooth 14 coacting'with an alarm cam 15 mountedupon the forward face of an alarm-wheel 16 turning upon the alarm shaft11 on which it has longitudinal movement and meshing into an alarmpinion 17 rigid with the hour hand socket 5 and therefore making arevolution once in twelve hours. As there are twice as many teeth in thealarm wheel 16 as in the alarm pinion 17, the alarm cam 15 completes arevolution only once in twenty-four hours.

The action of the cam 15 which is driven by the time-train of themovement, upon the tooth 14 of the alarm collet 13, causes the alarmwheel 16 to be moved from front to rear upon the shaft 11 againstthetension of an alarm spring 18 secured to the front face of the frontmovement plate 19, the said spring carrying a plate 20 having aperforation 21 through which the alarm shaft 11 passes. The said plate20 carries a conical lifting-cam 22 terminating in a concentricwarning-pin 23. The said cam 22 operates a lifting-lever 24 hung at its-upper end from a stud 25 in the front movement plate 19 and engaging atits lower end with a lug 26 upon the lifting arm 27 of a locking-lever28 having a hub 29 by means of which it is mounted upon a stud 30 in thefront movementplate. A spring 31 engaging with the arm 27 exerts aconstant effort to keep the said lug 26 in engagement with the adjacentedge of the lifting lever 24. The said lever 28 also has an upwardlyextending stop-arm 32 having an inwardly turned stop-finger 33 co-actingwith a stop-h0ok 34 mounted upon the forward end of the oscillatingverge-arbor 35 carrying the verge 36, the bell-hammer 37 and theshut-off wire 38 and forming a part of the alarm-train which is ofordinary con. struction and need not therefore be pariicularlydescribed. The verge-arbor 35 also carries a warning-arm 39 extendingdownward into position to coact with the warning pin 23 beforementioned. The said lockinglever 28 is further provided with analarmsustaining arm 40 having a finger 41 riding upon the edge of analarm-sustaining disk 42 rigidly connected by small posts 43 to the mainor first wheel 44 of the alarm train, and formed with a stop-notch 45normally closed by means of an oscillating shutter 46 interposed.between the said disk 42 and a collet 47 secured thereto. A spring 48exerting a constant effort tohold the shutter in the position in whichit closes the stop-notch 45, is attached at one end: to a screw 49carried by the shutter, and at its opposite end to a flat stop-finger 50set radially into the disk 42 and entering a stop notch 51 therein, theopposite walls of thesaid notch engaging with the opposite faces of thefinger 50 to limit the oscillation of the shutter which projects justenough beyond the edge of the disk 42 for engagement by the finger 41 ofthe alarmsustaining arm 40.

The operation of my improved clock is as follows:-The alarm is set to gooff as desired by means of the finger-button 9 which is turned to sweethe alarm hand 2 clockwise over the dial The alarm having been set, theoperation of the tin1e-train will effect the rotation and consequentrearward movement of the alarm-wheel 16, whereby the conical lifting-cam22 will be slowly pushed rearward with the effect of slowly operatingthe lifting-lever 24 which will in turn slowly turn the lockingdever 28upon its stud 30. As the lever 28 is swung upon its stud 30, thestop-finger of its stop-arm 32 will be moved out from under the stophook 34 car-v ried by the verge-arbor the hook 34' to drop, but thealarm-train is not let-off because as the hook 34 drops, the warning-finer 39 is brought into engagement with the warning pin 23 at the end ofthe cam 22. The continued action of the cam 22 against the lever 24 nowlifts the finger 41 of the alarm-sustaining arm 40 out of the stop notch45 in the disk 42 and permits the spring 48 to act to oscillate theshutter 46 so as to close the stop notch 45. Now when the drop of thealarm-cam 15 is brought into re istration with the tooth 14 of thelet-off coIlet 13, the spring 18 acts to ush the alarmwheel 16 forward011 the a arm-shaft 11, whereby the warning-pin 23 is moved forward anddisengaged from the lower end of the warning finger 39. This permits thealarm-train to start. Although at this moment the finger 41 of thealarm-sustaining arm 40 is located directly over the stopnotch 45 in thedisk 42, it is prevented from entering the said notch by the shutter 48.The arm 41 therefore rides,so to speak, upon the projecting end of theshutter and upon 35. This permits the edge of the disk until the diskhas made one complete revolution. Just before that the arm will engagewith the adjacent edge of the projecting end of the shutter whereby theshutter wil l he held against rotation with the disk, but the diskcontinuing to revolve, will gradually bring its stop-notch 45 into registration with the edge of the finger 41 which will drop into the notch 45just as the disk completes its revolution. It will now be understoodthat the disk 42 sustains the sounding of the alarm during onerevolution of the disk, and hence one revolution. of the main wheel 44of the alarm-train.

I claim 1. In an alarm clock, the combination with a twelve-hourtime-dial which is utilized for setting the alarm, of an alarm-handarranged concentrically with the said twelve -hour time-dial, meanslocated. at one side of the center of the said dial and operated by thetime mechanism of the clock for releasing the alarm-mechimism of theclock once in twentyfour hours, and an alarm-setting mechanism alsolocated at one side of the center of the dial and geared to the saidalarm-hand.

2. In an alarm clock, the combination with a twelve-hour time-dialwhichis utilized for setting the alarm, of an alarmehand arrangedconcentrically with the said twelve-hour time-dial, a center shaft, analarm-setting shaft located at one side of the said center shaft andgeared to the said alarm-hand for sweeping the same over the dial, and atwentyfour hour alarm-wheel turning upon the said alarm-setting shaftand rotated once in twenty-four hours by the tii'ne-mechanism of theclock.

3. In an alarm clock, the combination with a twelve-hour time-dial whichis utilized for, setting the alarm, of a center shaft, an hourhandsocket located tl'iereupon, an alarmsetting pinion turning loosely uponthe said socket, an alarn1-hand carried by the said pinion for sweepingthe time dial, an alarmsetting shaft located at one side of the saidcenter shaft, an alarm-setting wheel mounted upon the said alarm-settingshaft and meshing into the said alarm-setting pinion, an alarm-wheelturning loosely upon the alarmsetting shaft and rotated once intwenty-four hours by the time-mechanism of the clock, and means coactingwith the said alarmwheel for letting off the alarm train once intwenty-four hours.

4. In an alarm clock, the combination with the time-dial and centershaft thereof, of an. alarm-setting pinion axially mounted with respectto the center shaft, an alarm hand carried by thesaid alarm-settingpinion, an alarm-setting shaft, an alarm-settingwheel carried therebyand meshing into the said alarm-setting pinion, an alarm-wheel turningupon the alarm-setting shaft, and rotated once in twenty-four hours bythe time-train,

an alarm-cam rotating with the said alarm- I an alarm sustainingmechanism coacting wheel, an alarm spring ooacting with the saidalarm-wheel for moving the same longitudinally upon the alarm-settingshaft, a combined lifting-cam and warning pin carried by the saidspring, a lifting lever coacting with the said cam, a locking lever operated by the lifting lever, a stop hook coacting with the locking lever,a warning finger co- 10 acting with the warning-pin aforesaid, and

with the said locking-lever for sustaining the sounding of the alarm.

In testimony whereof, I have signed this specification in the presenceof two sub- 15 scribing witnesses.

, WILSON E. PORTER. Witnesses:

CLARA L. WEED, v FREDERIO O. EARLE.

